package operator;

public class Demo07 {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;

        a+=b; //a = a + b
        a-=b; //a = a - b
        a*=b; //a = a * b
        a/=b; //a = a / b
        System.out.println(a);

        //字符串连接符  + , String
        System.out.println(""+a+b); //1020
        System.out.println(a+b+""); //30

    }
}
